List,
Check these out on ebay
5370A W/Rubidium. Item number: 321147995106. Slick, but I wonder about the
heat issue.
HP 3325B W/Rubidium. Item number: 300907767545. Very nicely
done. IMHO, fairly priced.
Regards,
Perrier
_
On 6/22/13 5:35 PM, Bob Camp wrote:
Hi
How stable a 1.023 oscillator? How much pull range on that oscillator? H…..
Doppler is the big component..several kHz..
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To unsubscribe, go to https://www.fe
The university of Florida still owned, that's right owned, an IBM 709 when I
was there 1960 through 1968. I took a tour of it and punched a few cards to
program it.
IBM didn't sell computers to anybody not even the feds but they sold this
one. That should have made the purchasing department
That's amazing.
Regards.
Max. K 4 O DS.
Email: m...@maxsmusicplace.com
Transistor site http://www.funwithtransistors.net
Vacuum tube site: http://www.funwithtubes.net
Woodworking site
http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html
Music site: http://www.maxsmusicp
Hi Bob,
On 06/23/2013 02:35 AM, Bob Camp wrote:
How accurate?? Resolvers are good to about 16 bit accuracy, so I guess 1
part in 60,000. if the orbit circumference is 163 Mm, then a resolver
can determine the position to a few km.
However, I don't know that that is good enough. If you need to kn
Hi Bob,
On 06/23/2013 02:35 AM, Bob Camp wrote:
Hi
How stable a 1.023 oscillator? How much pull range on that oscillator? H…..
The 1.57542 GHz carrier gets you to +/- 6 kHz which is about +/- 3.8
ppm, so it's not that hard to do.
Cheers,
Magnus
_
Note for the Cygwin executables, comport parameter in the unix format.
e.g. fe5680a_logger.exe /dev/com1
by using comm_5680 I was able to get Hadamard Deviation down from 1.15E-10 to
2.75E-12 @100 Seconds !!!
In any man's book, a fantastic improvement.
I have yet to let it settle down and a twe
Hi
On Jun 22, 2013, at 8:13 PM, Magnus Danielson
wrote:
> On 06/23/2013 01:52 AM, Jim Lux wrote:
>> On 6/22/13 4:38 PM, Magnus Danielson wrote:
>>
electromechanical.. like omega receivers. rotary transformers can do
very high quality trig functions, but do you actually need tr
Hi
How stable a 1.023 oscillator? How much pull range on that oscillator? H…..
Bob
On Jun 22, 2013, at 8:20 PM, Magnus Danielson
wrote:
> Hi Bob,
>
> On 06/23/2013 02:06 AM, Bob Camp wrote:
>> Hi
>>
>> Well if the chip rate is at or above 1 MHz, a wavelength is 300 meters or
>> less. A
Hi Bob,
On 06/23/2013 02:06 AM, Bob Camp wrote:
Hi
Well if the chip rate is at or above 1 MHz, a wavelength is 300 meters or less.
A 1 KM error is probably a bit to large.
A tube-channel to keep tracking within a chip does not seem too hard.
Utilizing that precision for the rest of the calc
On 06/23/2013 01:52 AM, Jim Lux wrote:
On 6/22/13 4:38 PM, Magnus Danielson wrote:
electromechanical.. like omega receivers. rotary transformers can do
very high quality trig functions, but do you actually need trig
functions assuming you're just solving for X,Y,Z,T.
Oh yes. Check IS-GPS-200
Hi
Well if the chip rate is at or above 1 MHz, a wavelength is 300 meters or less.
A 1 KM error is probably a bit to large.
Bob
On Jun 22, 2013, at 7:52 PM, Jim Lux wrote:
> On 6/22/13 4:38 PM, Magnus Danielson wrote:
>
>>>
>>> electromechanical.. like omega receivers. rotary transformers c
On 6/22/13 4:38 PM, Magnus Danielson wrote:
electromechanical.. like omega receivers. rotary transformers can do
very high quality trig functions, but do you actually need trig
functions assuming you're just solving for X,Y,Z,T.
Oh yes. Check IS-GPS-200F, clause 20.3.3.4.3 User Algorithm for
Hi
If you are talking about a "tube only" design ( = no solid state diodes) - I
doubt you can get a navigation fix (download the almanac etc) before you hit
the mean time to failure of the gizmo.That's based on the published
remembrances of those who ran them. All of the tube based computers I'
On 06/23/2013 12:59 AM, Jim Lux wrote:
On 6/22/13 3:28 PM, Magnus Danielson wrote:
On 06/23/2013 12:04 AM, Jim Lux wrote:
I think that doing the PN code and correlator is something that could be
done with tubes (especially if you didn't want to go P-code).
I suppose you could use a counter to
On 6/22/13 3:28 PM, Magnus Danielson wrote:
On 06/23/2013 12:04 AM, Jim Lux wrote:
I think that doing the PN code and correlator is something that could be
done with tubes (especially if you didn't want to go P-code).
I suppose you could use a counter to record the changes in code phase as
you
In that case, I probably have more information than I have any right to have.
=)
thanks,
Bob
- Original Message -
> From: Bob Camp
> To: Bob Stewart
> Cc:
> Sent: Saturday, June 22, 2013 10:57 AM
> Subject: Re: [time-nuts] Still looking for datasheet for Trimble 34310-T (off
> l
Here's a better picture and block diagram of the RCA 7016 FM
Exciter. The motor can be seen in the center. Notice that the
plastic compartment that has the flywheel for the motor also has
about 1/4" of silicon oil to act as a damper to prevent low frequency
sound such as thumps from causing i
RCA made the MI-7016 exciter for their early FM transmitters that was
all tube, and phase locked to a crystal that was in the 100 kHz
region. The crystal frequency was determined by dividing the desired
operating frequency (88 to 108 MHz) by1296. It was lovingly called,
"The Iron Fireman". I
On 06/23/2013 12:04 AM, Jim Lux wrote:
I think that doing the PN code and correlator is something that could be
done with tubes (especially if you didn't want to go P-code).
I suppose you could use a counter to record the changes in code phase as
you scan for the correlation peak, so that gets y
Hello,
The last 25 hours I measured the jitter of my RPi-with-userspace PPS
processing. In the following graph you'll see those measurements. Each
row is an hour:
http://vps001.vanheusden.com/~folkert/jitter-hm.png
There's some kind of wave in it which I cannot explain: everything not
related to t
I think that doing the PN code and correlator is something that could be
done with tubes (especially if you didn't want to go P-code).
I suppose you could use a counter to record the changes in code phase as
you scan for the correlation peak, so that gets you your numeric code phase.
Getting
See my update I think the xtals no longer going to be an issue
On Sat, Jun 22, 2013 at 10:17 AM, paul swed wrote:
> Trying to catch up on several hundred work emails. Not exciting.
> I absolutely agree that the 60002 would make a lot of sense.
>
>
> On Sat, Jun 22, 2013 at 1:19 AM, Burt I. Wein
Thanks to Dave on Time-nuts I have been able to verify that the wwvb
remodulator works fine with the netclock/2 or the spectracom 8182. On the
8182 if you use it with the remodulator it senses the antenna. You need a
1.8K resistor to ground to make the rcvr believe an antennas there. Its
actually a
On 06/22/2013 11:10 PM, Hal Murray wrote:
mag...@rubidium.dyndns.org said:
On 06/22/2013 05:27 PM, Didier Juges wrote:
A real treat would be to do the GPS receiver with tubes ;)
The the correlation channel(s) would be possible to do in tubes. The rest of
the processing is "problematic".
The
mag...@rubidium.dyndns.org said:
> On 06/22/2013 05:27 PM, Didier Juges wrote:
>> A real treat would be to do the GPS receiver with tubes ;)
> The the correlation channel(s) would be possible to do in tubes. The rest of
> the processing is "problematic".
The IBM 709 was tubes. (Well, mostly, th
On 06/22/2013 05:27 PM, Didier Juges wrote:
A real treat would be to do the GPS receiver with tubes ;)
The the correlation channel(s) would be possible to do in tubes.
The rest of the processing is "problematic".
Cheers,
Magnus
___
time-nuts mailing
If anyone can do it, it would be these people:
http://www.ominous-valve.com/tour.html
Home page:
http://www.ominous-valve.com/index.html
Dave
> -Original Message-
> From: time-nuts-boun...@febo.com
> [mailto:time-nuts-boun...@febo.com] On Behalf Of Max Robinson
> Sent: Saturday, June
Why set such puny goals. How about a smart phone with tubes.
Regards.
Max. K 4 O DS.
- Original Message -
From: "Didier Juges"
To: "Discussion of precise time and frequency measurement"
Sent: Saturday, June 22, 2013 10:27 AM
Subject: Re: [time-nuts] Oscillator temperature compens
A real treat would be to do the GPS receiver with tubes ;)
Didier
Joseph Gray wrote:
>>Otherwise you might just as well lock it up instead.
>
>Hmm, a 1970 vintage tube transmitter with a GPSDO frequency lock :-)
>
>Thanks to everyone for the suggestions. I will spend more time with
>this
>rig
No report from MSE here, and they all work as expected.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of Tom Miller
Sent: Sunday, 23 June 2013 12:12 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-
Nothing from Win7+latest Bitdefender update.
Le 22 juin 2013 à 16:12, Tom Miller a écrit :
> MSE reports the two .exe files as unsafe and contains a virus. Does anyone
> else see the same thing?
>
> Regards
>
> - Original Message - From: "Mark C. Stephens"
> To: "Discussion of precis
Another one, rejected for attachment size.
https://dl.dropboxusercontent.com/u/19599147/QST%20May%201930.jpg
A comment was made about how things have changed over the years regarding
frequency accuracy. I am currently going through a scanned set of QST
magazines that I borrowed and came across an
Burt,
Thanks for the information. I thought that the tolerance was supposed to
100 Hz, as You said. As far as I know, this is the original crystal that
came with the rig when NMSU bought it. I will spend more time working with
the rig this weekend.
I am looking for a solid state LPB transmitter,
Hi Bob and thanks for the feedback. Unfortunately, the only search hits I get
for Tekelec DOC-1903 are timenuts posts about the GSTM document and the GSTM
document, itself. But I did track down the Oak 4895 which should be similar.
In any case, I have enough information to put this together,
MSE reports the two .exe files as unsafe and contains a virus. Does anyone
else see the same thing?
Regards
- Original Message -
From: "Mark C. Stephens"
To: "Discussion of precise time and frequency measurement"
Sent: Saturday, June 22, 2013 9:59 AM
Subject: Re: [time-nuts] FE-586
Trying to catch up on several hundred work emails. Not exciting.
I absolutely agree that the 60002 would make a lot of sense.
On Sat, Jun 22, 2013 at 1:19 AM, Burt I. Weiner wrote:
> Paul,
>
> This is probably why they sell crystals cut for 60,002 kHz and 60,005 kHz.
> I ordered 10 of the 60,0
To Answer my own question, as obviously no one here knew the answer,
Its documented in the FE5680A technical manual.
After a couple of hours sending hex and working out checksums and generally
doing my head in I came across this site:
http://n5tnl.com/time/fe-5680a/control/
Some nice person has
Hi
According to the Nortel GSBW50AA spec on the Trimble GPSTM (page 26), T was
used for Tekelec DOC-1903 OCXO's.
Bob
On Jun 21, 2013, at 11:17 PM, Bob Stewart wrote:
> I found an old post that indicated that it is a relabeled Vectron OC-050.
> Can anyone verify that? I've gotten most of th
Joe, I have placed the two .pdf's permanently on one of my web pages:-
http://www.vk7krj.com/ham_stuff.htm
Ken, vk7krj
www.vk7krj.com
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